Recent progress on superconductors with time-reversal symmetry breaking

Abstract

Superconductivity and magnetism are antagonistic states of matter. The presence of spontaneous magnetic fields inside the superconducting state is, therefore, an intriguing phenomenon prompting extensive experimental and theoretical research. In this review, we discuss recent experimental discoveries of unconventional superconductors which spontaneously break time-reversal symmetry and theoretical efforts in understanding their properties. We discuss the main experimental probes and give an extensive account of theoretical approaches to understand the order parameter symmetries and the corresponding pairing mechanisms including the importance of multiple bands.

29 pages, 10 figures

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Cited by in corpus (70)

• Charge order breaks time-reversal symmetry in CsV${}_3$Sb${}_5$
• Field-induced tuning of the pairing state in a superconductor
• The fate of time-reversal symmetry breaking in UTe2
• Magic angles and correlations in twisted nodal superconductors
• Muon-spin relaxation study of the layered kagome superconductor CsV${}_3$Sb${}_5$
• Chiral singlet superconductivity in the weakly correlated metal LaPt3P
• Current- and field-induced topology in twisted nodal superconductors
• Perspective on the muon-spin rotation/relaxation under hydrostatic pressure
• Superconducting-Spin Reorientation in Spin-Triplet Multiple Superconducting Phases of UTe2
• Heat capacity double transitions in time-reversal symmetry broken superconductors
• Supercurrent rectification with time-reversal symmetry broken multiband superconductors
• Inter-orbital singlet pairing in Sr${}_2$RuO${}_4$: a Hund's superconductor
• Calorimetric evidence for two phase transitions in Ba${}_{1-\mathrm{x}}$K${}_{\mathrm{x}}$Fe${}_2$As${}_2$ with fermion pairing and quadrupling states
• Nonunitary Superconductivity in Complex Quantum Materials
• Nonreciprocal Meissner response in parity-mixed superconductors
• Spontaneous time-reversal symmetry breaking by disorder in superconductors
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• Coexistence of ferromagnetism and superconductivity at KTaO${}_3$ heterointerfaces
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• Cascade of vestigial orders in two-component superconductors: nematic, ferromagnetic, s-wave charge-4e, and d-wave charge-4e states
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• Phase solitons in a weakly coupled three-component superconductor
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• Adatom engineering magnetic order in superconductors: Applications to altermagnetic superconductivity
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• High-order Time-Reversal Symmetry Breaking Normal State
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• Spontaneous magnetization in unitary superconductors with time reversal symmetry breaking
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• Quantum muon diffusion and the preservation of time-reversal symmetry in the superconducting state of type-I rhenium
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• Nodeless superconductivity in 4H${}_b$-TaS${}_2$ with broken time reversal symmetry
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• Symmetry Aspects of Chiral Superconductors
• Odd-frequency pairing and time-reversal symmetry breaking for repulsive interactions
• A Family of Lanthanide Noncentrosymmetric Superconductors La${}_4$$TX$ ($T$ = Ru, Rh, Ir; $X$ = Al, In)
• Time reversal invariant single gap superconductivity with upper critical field larger than Pauli limit in NbIr${}_2$B${}_2$
• Chiral superfluid helium-3 in the quasi-two-dimensional limit
• Pressure induced superconducting dome in LaNiGa2
• Probing the superconducting pairing of the La${}_4$Be${}_{33}$Pt${}_{16}$ alloy via muon-spin spectroscopy
• Spontaneous magnetic field and disorder effects in BaPtAs_1-x_Sb_x_ with honeycomb network
• Muon Knight shift as a precise probe of the superconducting symmetry of Sr${}_2$RuO${}_4$
• Intrinsic chiral topological superconductor thin films
• Nonequilibrium Green's function approach to multi-band Cooper-pair transport: linear magnetoresistance effect due to nonunitary superconductivity
• Observation of a pronounced Hebel-Slichter peak in the spin-lattice relaxation rate and implications for gap and pairing symmetry in LaNiGa${}_2$
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• Exotic Topological Phenomena in Chiral Superconducting States on Doped Quantum Spin Hall Insulators with Honeycomb Lattices
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